“A decoy installation must avoid the appearance of being a decoy. It is so constructed that its disclosure to the enemy appears to be the result of defects in its camouflage. There are various methods for accomplishing this deception, such as the disclosure of parts of a decoy, leaving tracks, incomplete concealment of shadows of decoys, or the improper use of surface texture or color. If a decoy draws attention away from a real installation, it serves its purpose. A decoy position which has been discovered to be such by the enemy may later be occupied as an actual position.”